A different System, therefore what are my chances?

I study in a differently formated school. Assuming that most people are more aware of American schooling and grading, could you tell me how I would fare if I had a chance to Ivies such as Upenn, Cornell, Dartmouth.

I believe my so called GPA would be: 3.9
Extra Curriculars: Football Team (Soccer in USA) for 4 yrs
Rugby Team for 3 yrs
Model United Nations, taken part 3 times
Junior Achievement program
Community service 7 yrs
Duke of Edinburgh gold

Everything we do is considered AP classes apparently so I am doing
History
Economics
English Lit
Maths

so they're all AP I am guessing?

I study in a British school so I was wondering if there would be anything I could do to improve my chance into these universities.

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